I just installed a vorsteiner type II diffuser using 3M (red/black) tape, 3M adhesive promoter and I got it totally flush before I pulled the red backing off the tape. The problem im having is, the tape keeps lifiting once I think my exhaust heats it up. Ive reinstalled it 3 times now. And when I put it on, Im not forcing it into place. It literally fits like a glove.

Any suggestions other than screws or expoxy? My plan was to use the diffuser and sell it when Im over it. So I would rather not put it on with anything that wont come off or will leave a mark. Any ideas?